Open E (ɛ) is the Unicode character at U+025B in IPA Extensions. Official name: LATIN SMALL LETTER OPEN E — an IPA vowel symbol (often written as epsilon). The URL says “uppercase,” but Unicode classifies it as a small letter.
Remember
Character ɛ
Unicode U+025B
Named entity (none)
Hex entity ɛ
Decimal ɛ
CSS escape \025B
Not the same Ɛ · ɜ · ɞ
Prefer ɛ or ɛ in HTML markup. You can also type ɛ in UTF-8. Use it in phonetic transcription, not as a stand-in for Latin E or Ê.
Using Hex Code: ɛ
Using HTML Code: ɛ
Using CSS Entity: ɛ
Typed directly: ɛ
IPA: ɛ
How It Works
1. Hex:U+025B → ɛ in HTML. Preferred numeric form when you need an entity.
2. Decimal: same code point as 603 → ɛ. Same glyph as hex.
3. CSS: use \025B in content (not an HTML entity). #point::after appends that ɛ after the paragraph text.
4. Typed: paste ɛ in a UTF-8 page. lang="und" marks the IPA token as undetermined language.
5. No named entity: HTML5 does not define a name for U+025B — use numeric references or type the character.
Pitfalls & Tips
Common mistakes when working with U+025B.
Slug
URL says “uppercase” — Unicode says small
This path includes “uppercase,” but U+025B is LATIN SMALL LETTER OPEN E. It is an IPA symbol, not a capital E.
vs Ɛ
Not capital open E
Ɛ (U+0190) is the capital form. Use it when you need the uppercase open E, not ɛ.
vs ɜ
Not reversed open E
ɜ faces the other way. ɛ and ɜ are different IPA vowels.
Named
No named HTML entity
There is no named entity for U+025B. Use ɛ or ɛ.
Fonts
Needs IPA font coverage
Many UI fonts omit IPA Extensions. Prefer a stack that includes an IPA-capable font if the glyph must always show.
CSS vs HTML
Do not mix escapes
\025B belongs in CSS strings. ɛ / ɛ belong in HTML.
Compatibility
Browser Support
Open E (U+025B) and its entity forms (ɛ, ɛ, CSS \\025B) are supported in all mainstream browsers. Visible glyphs depend on IPA font coverage.
✓ Universal support
Open E (ɛ)
Encode with hex, decimal, CSS escape, or type the character — same code point everywhere encoding is supported.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerAll versions
Yes
U+025B / entitiesFull support
Bottom line: Prefer ɛ or ɛ in HTML. Use \\025B only inside CSS content. There is no named entity.
Remember
Key Takeaways
Unicode: open E is U+025B (decimal 603) — glyph ɛ.
HTML: no named entity — use ɛ / ɛ / type ɛ.
CSS: use \025B inside content for generated text.
Meaning:ɛ is an IPA small letter — not Ɛ (capital open E), not ɜ (reversed).
One line:U+025B → ɛ / ɛ / CSS \025B (no named entity).
Frequently Asked Questions
Use ɛ (hex), ɛ (decimal), type ɛ directly in UTF-8, or the CSS escape \025B in content. There is no named HTML entity.
U+025B (LATIN SMALL LETTER OPEN E). Hex 025B, decimal 603. It belongs to IPA Extensions (U+0250–U+02AF).
No. Use numeric references ɛ or ɛ, or type ɛ in UTF-8.
No. Despite the page URL, Unicode names it a small letter. It is an IPA symbol, not a capital E. The capital open E is U+0190.
No. ɛ is the small open E. Ɛ (U+0190) is the capital open E. ɜ (U+025C) is the reversed open E.
HTML entities (ɛ or ɛ) go in markup. The CSS escape \025B goes in stylesheet strings (usually content on ::before/::after).
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Did you know?
Open E is Unicode U+025B (decimal 603) — glyph ɛ in IPA Extensions (U+0250–U+02AF). Official name: LATIN SMALL LETTER OPEN E. HTML5 has no named entity — use ɛ or ɛ. The URL says “uppercase,” but Unicode classifies this as a small letter. Do not confuse with capital open E U+0190 (Ɛ) or reversed open E U+025C (ɜ).
